RETRACTED: Site-selective enzymatic C‒H amidation for synthesis of diverse lactams

This preprint has been retracted by the authors because efforts to reproduce the work were not successful and contemporaneous entries and raw data for key experiments were found to be missing in lab reports. Please note that this work has been retracted by the authors. After publication of the Report “Site-selective enzymatic C‒H amidation for synthesis of diverse lactams” in Science ( 1, also linked in metadata ), efforts to reproduce the work showed that the enzymes do not catalyze the reactions with the activities and selectivities claimed. Careful examination of the first author’s lab notebook then revealed missing contemporaneous entries and raw data for key experiments. The authors therefore have retracted the article from Science and are now retracting the preprint from ChemRxiv. The original paper can be accessed by selecting “Version 1” of the preprint below, or by accessing https://doi.org/10.26434/chemrxiv.7711418.v1 . Inha Cho, Zhi-Jun Jia, Frances H. Arnold* Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. *Corresponding author. Email: [email protected] References 1. I. Cho, Z.-J. Jia, F. H. Arnold, Science 364 , 575 (2019). DOI: 10.1126/science.aaw9068 ******************************************************************************************* Directed evolution of cytochrome P450 enzymes fine-tunes site selectivity of new-to-nature C‒H amidation for modular, sustainable and scalable preparation of enantio-enriched β-, γ- and δ-lactams.